Mineralogy and Geology. 109 
ribs, the pectoral and pelvic arches, the sacrum formed of six anchy- 
losed vertebre, the bones of the extremities, and certain dermal-ap- 
pendages, were successfully described, and illustrated by drawings and 
Specimens. From the facts adduced, Dr. Mantell infers that this stu- 
Was a8 massive in its proportions; for living exclusively on vegetables, 
limbs 
y 
long; and the largest _Iguanodon may have attained a length of from 
fifiy to sixty feet, 
_ The Hyleosaurus, Megalosaurus, and several other genera of rep- 
tiles were ‘severally noticed, and reference made to the specimens in 
the British Museum. The Pelorosaurus was next described somewhat 
0 detail, and the characters of the stupendous humerus, or arm-bone, 
(43 feet long,) scapula, clavicle, vertebrae, sacrum, and pelvis, were 
Pointed out, with the view of illustrating a most — ey 
ie apy ealden sandstone lying on the Sussex coast, an 
Which was only visible at low water, the a8» radius and _ our 
humerus, (arm-bone;) of a gigantic reptile, 
ssa ies of Pelorosaurus, — pro- 
Posed to name Pelo 1 ecklesii. Tie generic identity and spe- 
CYfe di between this-hamerus, and that of the Pel. Conybeari, 
” 
PF leti ae P *... 
ws 
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ate 
